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Performance-Based Common Stock Warrants (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Purchase Level and Number of Warrants That Will Vest The table below presents the purchase levels and potential number of warrants to vest in each period based upon achieving these purchase levels.
 Potential Warrants To Vest
Aggregate Level of Purchases by Comcast and AffiliatesJanuary 1, 2016 - December 31, 2017January 1, 2018 - December 31, 2019January 1, 2020 - December 31, 2021
$260 million100,000 100,000 75,000 
$300 million75,000 75,000 75,000 
$340 million75,000 75,000 75,000 
Maximum Potential Warrants Earned by Comcast250,000 250,000 225,000 
Assumptions Used in Valuation and Weighted Average Fair Value of Warrants
The assumptions we utilized in the Black-Scholes option pricing model and the resulting grant-date fair value of the warrants as of January 1, 2020 were the following:
Fair value$17.19
Price of Universal Electronics Inc. common stock$52.21
Risk-free interest rate1.62 %
Expected volatility48.86 %
Expected life in years3.00
The assumptions we utilized in the Black-Scholes option pricing model and the resulting weighted average fair value of the warrants were the following:
Year Ended December 31,
20192018
Fair value$21.60$3.45
Price of Universal Electronics Inc. common stock$58.01$24.81
Risk-free interest rate1.65 %2.49 %
Expected volatility48.90 %43.16 %
Expected life in years3.134.00
Impact to Net Sales in Connection with Warrants and Related Income Tax Benefit
The impact to net sales recorded in connection with the warrants and the related income tax benefit was as follows:
Year Ended December 31,
(in thousands)202020192018
Reduction to net sales$686 $1,997 $163 
Income tax benefit171 498 41